Granted Patent
Utility
US 4,948,818 · App. 07/351,896
Method of making porous hydrophilic-lipophilic copolymeric powders
Inventors:
Walter J. Carmody, Anthony J. Buzzelli
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: May 15, 1989
Inventors
Walter J. Carmody
Anthony J. Buzzelli
Assignee (at issue)
Dow Corning Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.